I'd thought this would have been somewhere in Denmark or Norway

Denmark had an unfortunate situation about 13 years ago, where the only rail bridge to the northern part of the country was hit by a ship, cutting rail network in two. Some trains where stuck in the north and had to be ferried to Sweden and the take the trip down from Gotenburg, via Malmö and then across the bridge to Copenhagen, because those trains where needed to maintain the service level.

Since then I've been wary of dismantling too much backup infrastructure. The rail tracks to the ferry terminal was still in place in this case, because they are listed as NATO infrastructure, still they where barely maintained.

The tracks on the Gothenburg side have since been removed, so even this workaround would not be possible today (they would have to go to Trelleborg instead).

That's a fascinating bit of rail history

https://da.wikipedia.org/wiki/Jernbanebroen_over_Limfjorden#... See the 2012 collision, in Danish only, sorry.

It used be one between Denmark and Germany. Likely that one you are thinking about. Canceled due to the Fehmarn Belt bridge construction.

If that’s a new term to you, more info at https://en.wikipedia.org/wiki/Fehmarn_Belt_fixed_link. It’s a new submerged tunnel that’s being constructed between Germany and Denmark, hopefully opening in 4 years time (though that’s looking increasing unlikely at this point).

I’m looking forwards to it as it’ll nearly halve the Copenhagen <-> Hamburg train time, down to 2 hours and 20 minutes.

Meanwhile on the other side of that lovely little island:

> In 2025 when the tunnel (the Fehmarn Sound Tunnel) was still not approved by authorities it was revealed that it would not be opened in 2029 as it was then planned but in 2032, which would delay train traffic along the new connection until then. Road traffic can use the old bridge.

Source: https://en.wikipedia.org/wiki/Fehmarn_Sound_Tunnel

I would bet actual money that we (as in we Germans) don't get that tunnel done before 2035.

There's a bridge between Denmark and Sweden.

https://en.wikipedia.org/wiki/Øresund_Bridge

In 1989 I took the rail/ferry link traveling from Germany to Copenhagen (and back)... It's faster now, but not as "cool"